Control of Internal Environment (Challenge of Exercise (Proetin…
Control of Internal Environment
Definition of exercise physiology - From a structural and functional point of view- responds, adjusts and adapts to exercise and training.
System body respond to exercise
Physical exercise->acute stimulus activates systemic local adjustment resulting in temporal change allowing the system to accommodate increased demands.
Training ->chronic stimulus promotes cellular adaptations, results in persistent changes that increase functional capacity and improve performance.
Way individual cells respond to exercise the biochemistry and molecules biology of exercise.
Homeostatic Vs Steady State
Homeostasis- Maintenance of a constant internal environment under normal resting condition eg temperature
Steady State: maintenance of a constant internal environment under exercise condition eg impose exercise for 40min. Set speed, increase heart rate then plateau known as the steady state.
Biological Control System
Series of interconnected component that serve a maintain a physical or chemical parameters of the body at near a constant value.
A receptor ,integrator an effector eg a (
) of co2 increasing in the blood is detected by the phox2b cells which are the (
)which is processed in the thalamus (
) and the (
is the spasm of your intercostal and your diaphragm to make you breathe normally.
Movement and the Provision of Energy
Energy (KCAL or KJ) - the capacity to perform work
Work Kcal- the application of force through a distance, F*D
Power (WATT) -the amount of work performed in a given time Force x Velocity
Muscular contraction involves the transformation of chemical energy into mechanical energy
ATP-> ADP + P+Energy
Calories/Kilocalroie is the Energy in biological system .
Food sources are broken down via catabolism, At rest, the body uses carbohydrate as fats for energy, protein provides little energy for cellular activity, but serves as building blocks for body tissue.
ATP- Energy is stored int he bonds of ATP
Adenotriphosphate has 3phosphates
Adenosine diphosphate has 2 phosphates
Energy systems varies by intensity,length of exercise and repetition.
- production via breakdown of Phosphocreatine
ATP production via breakdown of glucose in the absence in of oxygen
ATP- production via breakdown of glucose in the presence of oxygen
Challenge of Exercise
Proetin breakdown and repair
Ventilation and respiration
Metabolic Regulation (ATP)
Acd base balance system